I run the 140 gr. Nosler ballistic Tip at 2800 FPS in my Winchester M70 Featherweight with 22" barrel. The load was worked up during the summer when temps were well over 100 degrees. (105 to 10 on average) The load was the Nosler BT, Winchester brass and standard primer.
Powder was 47.0 gr. of W760. W760 and H414 are the same powder, just different packaging. The load has prover safe in the M70 and in a Ruger #1 A, However it has shown to be too hot in a custom Mauser I have. My suggestion is start at about 45 gr. and work up in half grain increments. FWIW, at 47.5 gr. bolt lift started showing slight stickiness on opening.
Accuracy in the M70 runs .75" on average and about .85" in the #1.
Paul B.
